Million Whys Press logo
Million Whys PressToronto
← Book 10 videos

Book 10, Question 59 · Video

Why Does Fear Make Your Heart Race?

Video · 1:48 · Crafty Clover explains, from A Million Whys Book 10

Fear makes your heart race because your body's alarm system is switching on! It is called the fight-or-flight system. It releases alert chemicals so you can react fast.

Read the full answer →

What Crafty Clover says in this video

Intro

Hi there, curious minds! I'm Crafty Clover! Let's discover something amazing. Why does fear make your heart race?

The Big Idea

Fear makes your heart race because your body's alarm system is switching on! It is called the fight-or-flight system. It releases alert chemicals so you can react fast.

Brain Spots Danger

Step one: the brain spots danger. When you see or hear something scary, a small part of your brain called the amygdala reacts in a flash. It sounds the alarm before you even think, which is why you jump at a sudden loud noise.

Alert Chemicals

Step two: alert chemicals. Your body releases chemicals like adrenaline into your blood. Your heart beats faster and you breathe quicker, sending more fuel to your muscles.

Ready to Act

Step three: ready to act. That helps you jump away or get to safety in real danger. It can be intense for a spelling test, too, even when there is no real danger.

A Closer Look

Let's take a closer look! Your heart races to send blood quickly. Your breathing speeds up. Your hands may get sweaty. And your muscles get ready to move.

Quick Facts

Quick facts! Alarm mode is body-wide. Everyone feels it, even the bravest people, and it does not mean something is wrong with you. Slow breathing tells your body that you are safe, so the alarm can switch off. If you feel scared a lot, talk to a trusted grown-up.

Think Like a Scientist

Now, think like a scientist! Name one calming breath trick you like. You can breathe in for 4 counts and out for 4 counts. Or smell a pretend flower, and blow out a pretend candle!

Outro

Fear flips on your body's alarm, and slow breaths can calm it. Science is amazing! Crafty Clover can be found on Amazon Books, Google Bookstore, and Apple Books. Available for purchase or download! Bye for now!

Why I wrote this